3. Energy Storage and Flexibility

Hydrogen & Fuels — Quiz

Test your understanding of hydrogen & fuels with 5 practice questions.

Practice Questions

Question 1

Which electrolysis technology uses a liquid alkaline electrolyte (e.g., KOH) and typically operates at temperatures around 60–80 °C?

Question 2

Compared to hydrogen compressed at 700 bar, liquid hydrogen at −253 °C provides approximately which volumetric energy density ratio?

Question 3

Fischer–Tropsch synthesis requires syngas with an approximate H2:CO molar ratio of:

Question 4

The flammability limits of hydrogen in air at atmospheric pressure and room temperature are approximately:

Question 5

Blending hydrogen into natural gas pipelines above ~20 % by volume primarily raises which concern?